19661962 has 16 divisors (see below), whose sum is σ = 31336200. Its totient is φ = 9220608.

The previous prime is 19661951. The next prime is 19661989. The reversal of 19661962 is 26916691.

It can be written as a sum of positive squares in 4 ways, for example, as 18757561 + 904401 = 4331^2 + 951^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11038 + ... + 12694.

Almost surely, 2^19661962 is an apocalyptic number.

19661962 is a deficient number, since it is larger than the sum of its proper divisors (11674238).

19661962 is a wasteful number, since it uses less digits than its factorization.

19661962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025.

The product of its digits is 34992, while the sum is 40.

The square root of 19661962 is about 4434.1810968881. The cubic root of 19661962 is about 269.9037700051.

The spelling of 19661962 in words is "nineteen million, six hundred sixty-one thousand, nine hundred sixty-two".